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US2952289A - Locknut having integral locking membrane therewith - Google Patents

Locknut having integral locking membrane therewith Download PDF

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Publication number
US2952289A
US2952289A US700711A US70071157A US2952289A US 2952289 A US2952289 A US 2952289A US 700711 A US700711 A US 700711A US 70071157 A US70071157 A US 70071157A US 2952289 A US2952289 A US 2952289A
Authority
US
United States
Prior art keywords
membrane
nut
thread
locknut
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US700711A
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English (en)
Inventor
Kreidel Hans
Jr Hans Kreidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventex AG
Original Assignee
Inventex AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inventex AG filed Critical Inventex AG
Application granted granted Critical
Publication of US2952289A publication Critical patent/US2952289A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/38—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt with a second part of the screw-thread which may be resiliently mounted

Definitions

  • Known devices for locking nuts in assembled position upon threaded bolts and the like include the use of counter-nuts or conical nuts or slotted nuts having recesses formed therein for accommodating splints, wires and the like which extend through bores in the corresponding threaded bolts.
  • locknuts known which are made of one piece and wherein the locking against inadvertent loosening is due to a braking action of the thread. The braking action is effected by a deformation of the body of the nut which may be provided with slots formed therein.
  • the thread is undercut by a narrow groove resulting in the formation of a relatively thick annular bead carried by the body of the nut.
  • This bead is connected-with the body of the nut by the ridge portion extending between the base of the groove and the outer surface of the nut, thus anchoring the bead relatively rigidly in its position.
  • the braking action between the thread of the nut and the thread of the bolt or the like, on which the nut is placed, is to be efiected by plastic deformation and particularly by inward jamming of the rigid and relatively non-elastic annular bead, requiring a special tool so as to avoid crushing of the connecting ridge extending between the bead and the nut body.
  • the relatively rigid positioning of the bead prevents satisfactory elastic action thereof with respect to the thread, during the threading operation.
  • the plastic deformation of the bead may easily resultin damaging the thread turns and particularly, displacing such turns so that they extend at the deformed bead detrimentally displaced relative to the axis of the threaded connection.
  • the resilient action that may be achieved in such structure is at best very slight and subject to quick fatigue, especially in cases in which the corresponding connection is under strong tensile stress or variable stress or subjected to vibration.
  • a particular disadvantage resides in the fact that such nut locking device does not give any possibility to avoid as an afiecting factor the necessary and permissible play between the inner thread of the nut and the outer thread of the bolt on which the nut is placed.
  • the corresponding locknut carries a ring-shaped extension at the free end thereof, such extension being bent over inwardly and provided tates Patent 1 Patented Sept, 13, 1960 with an inner thread in common with the nut body.
  • This ring-like extension is extremely thin so that it can function in the manner of a membrane and is disposed approximately midway of the circular plane extending at the corresponding end of the nut body between the circular terminal plane of the inner thread and the circle defined by the surfaces of the polygon provided for cooperation with a wrench.
  • the inwardly bent ringlike membrane extends at an acute angle with respect to the inwardly conically extending end surface of the nut body.
  • the membrane may be of convex or concave or plane configuration.
  • the nut body with the inwardly bent membrane is provided in one operation with throughout identical thread.
  • the braking action between the membrane and the corresponding threaded bolt is to be eifected upon threading the nut upon the bolt.
  • the thin membrane thereby enters into the outer thread turns of the bolt and is deformed in undulating wavy manner, thus producing a certain locking action with respect to the thread on the bolt. Since the membrane extends at an acute angle with respect to the inwardly c-onically shaped nut body, considerable stresses will result at the transition between the thin membrane and the nut body.
  • the invention avoids the disadvantages and drawbacks of prior locknuts of the above indicated kind by fully utilizing in a locknut the elastic braking forces that can be achieved with a locking membrane, in a manner that will meet all requirements for securing the nut in assigned position. This is achieved by particular configuration of the locking membrane in conjunction with particular configuration of the nut body carrying the inner thread and the free end of such nut body.
  • the locking membrane is in accordance with the inven tion of potlike configuration. Its base is disposed upon the nut approximately along an annular plane defining the outer end of the wrench polygon.
  • the outer diameter of the locking membrane corresponds approximately to the diameter of a circular line extending in alignment with the surfaces of the wrench polygon, the inner surface of the membrane being spaced by an annular trenchlike groove from the part of the nut body carrying the inner thread, such part extending into the bell-shaped space formed by the pot-shaped membrane.
  • the nut body and the annular opening of the potor bell-shaped membrane are provided with the identical inner thread, but the thread along the inner edge of the membrane is axially displaced with respect to the inner thread of the nut.
  • the potor bell-shaped locking membrane according to the invention easily absorbs the forces occurring at its base and exhibits at its inner edge or rim elastic restoring power acting upon the thread turns of the corresponding threaded bolt with a strength that is suificient for producing satisfactory braking or locking action.
  • the trenchlike annular space formed between the nut body and the membrane and extending axially inwardly of the nut body to a depth beyond the operationally free end thereof facilitates the bending-over required for forming the membrane and places the membrane in a position in which its elastic action can become fully effective.
  • the locknut according to the invention is threadedly joined with a screw-threaded bolt or the like, with the locking membrane disposed at and overlying the free end of the corresponding nut.
  • the potor bell-shaped locking membrane extends in its initial position approximately perpendicular to the axis of the corresponding threaded bolt or threaded shaft and is free to move substantially only in a direction axially away from the body of the nut. There is in opposite direction practically no possibility for displacement because the membrane is nearly in engageent with the nut body.
  • the thickness of the membrane should exceed one-half of the width of a thread turn and may correspond to the width of a thread turn.
  • the restoring forces of the membrane will in such structure become effective in far reaching manner uniformly as braking or locking forces with respect to the flanks of the thread, such that these braking forces are easily overcome during the tightening of the corresponding nut while requiring greater force incident to loosening the nut.
  • the braking force may be increased by varying the pertinent factors, especially by increasing the thickness of the membrane, to such an extent that inadvertent loosening of the nut becomes impossible.
  • Fig. 1 shows a locknut according to the invention in part elevational and part sectional view
  • Fig. 2 shows the locknut in part sectional part elevational view in assembled, threaded connection with a bolt
  • Fig. 3 is a fractional part sectional view of the locknut prior to forming the inner thread thereon;
  • Fig. 4 is a view showing the locknut according to the representation of Fig. 3 but with the inner thread formed therein.
  • the blank for the locknut is formed with a tubular axially extending skirt 1 shown in Fig. 3 in dotted lines, the skirt having an outer diameter corresponding substantially to the diameter of a circular line which approximately coincides with a line defining the diameter on which aredisposed the wrench polygon surfaces.
  • This skirt is peened over or bent radially inwardly about to to form the locking membrane shown in Fig. 3 in full lines.
  • the inner thread is thereafter cut in one operation in the nut body 2 and in the membrane 1, resulting in the structure indicated in Fig. 4, whereupon the membrane 1 is pressed axially inwardly to position it as close as possible to the free end of the nut body into the position in which it is shown in Fig.
  • the membrane 1 in which position it can exert the braking or locking action according to the invention.
  • the membrane can practically move during the threading of the nut on a screw bolt 3 only in a direction axially away from the nut body 2, as shown in Fig. 2.
  • the membrane 1 thereby expands, that is, it spreads resilently somewhat within the range of its displacement against the nut body, resulting in a braking or locking action between the flanks of its screw thread and the flanks of the thread on the bolt 3, which is essentially effective in the direction of the nut body, thus securing the nut against inadvertent or accidental loosening.
  • the various factors affecting the operation of the locking membrane for example, positioning of the base thereof radially outwardly of the nut body and axially thereof, provision of a relatively wide well rounded trenchlike intermediate space extending axially into the nut body, thickness of the membrane so as to accommodate one or more turns of the thread, may be controlled as desired so as to provide braking forces of a magnitude that will make accidental or undesired loosening of the nut practically impossible.
  • the inner thread of the locknut is in tightened position thereof covered toward the outside, thus preventing ingress of dirt and moisture that might affect its secure position.
  • the nut may be made of any desirable and suitable material.
  • a locknut comprising a nut body proper carrying an inner thread cut therein, a generally pot-shaped locking member disposed at the operationally free end of said nut body, said locking member comprising an annular generally cylindrical base portion, the outer surface of which coincides substantially with the wrench portion of the nut body, said base portion being integral with said nut body and extending a substantial distance coaxially therefrom, said base portion being of uniform thickness extending axially of said nut body and bent downwardly to project over the end surface of said nut body as close as possible thereto so as to provide a radially inwardly extending locking membrane formed with a central opening therein having a continuous peripheral edge provided with an inner thread cut therein corresponding to the inner thread cut in said nut body, the thread carrying portion of the latter projecting into said pot-shaped locking member with the free end face of such thread carrying portion disposed adjacent to the inner face of said locking membrane, and the peripheral portion of said thread carrying portion disposed in radially spaced relation with respect to the inner surface of said base portion, said locking membrane
  • said locking membrane extending gagement with said bolt. substantially in parallel with said surface and consequently being movable substantially only in an axial References Cited in the file of this patent direction away from said surface of said nut body. 5
  • a locknut according to claim 1 for threaded cooperation with screw-threaded bolt or the like, wherein UNITED STATES PATENTS said locking membrane exerts in threaded engagement 2,258,181 Hinds Oct. 7, 1941 with said bolt on the flanks of the thread engaged thereby 2,385,390 Tripp Sept. 25, 1945 elastic pressure in a direction axially of the body of said 10 2,834,390 Stevens May 13, 1958

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)
  • Dowels (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
US700711A 1957-01-18 1957-12-04 Locknut having integral locking membrane therewith Expired - Lifetime US2952289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH818979X 1957-01-18

Publications (1)

Publication Number Publication Date
US2952289A true US2952289A (en) 1960-09-13

Family

ID=4539223

Family Applications (1)

Application Number Title Priority Date Filing Date
US700711A Expired - Lifetime US2952289A (en) 1957-01-18 1957-12-04 Locknut having integral locking membrane therewith

Country Status (7)

Country Link
US (1) US2952289A (uk)
BE (1) BE563897A (uk)
CH (1) CH349452A (uk)
DE (1) DE1125237B (uk)
FR (1) FR1188753A (uk)
GB (1) GB818979A (uk)
NL (2) NL104754C (uk)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233262A (en) * 1963-02-18 1966-02-08 Vollman Walter Method of producing locknuts by assembling laminae in a housing
US3333553A (en) * 1964-11-03 1967-08-01 Evans Prod Co Cargo bracing device
EP0972956A1 (en) * 1998-07-17 2000-01-19 Urama S.r.l. Self-restraining metal ring nuts, and processes for the production thereof
US20030147719A1 (en) * 2001-12-12 2003-08-07 Jakob Manfred Self-locking threaded element
WO2007076968A1 (de) * 2005-12-22 2007-07-12 Hartmut Flaig Schraubmutter, verfahren zu ihrer herstellung und wekzeug dafür
WO2010034324A1 (de) 2008-09-24 2010-04-01 Hartmut Flaig Schraubmutter, verfahren und werkzeug zu iherer herstellung
US20180058590A1 (en) * 2016-08-26 2018-03-01 Azbil Corporation Regulating valve, valve body, valve stem, and locking member
WO2024122988A1 (ko) * 2022-12-05 2024-06-13 문상열 신축성너트 및 그 제조방법

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540195B1 (fr) * 1983-02-02 1986-09-19 Peugeot Dispositif de freinage pour liaison par filetage et ses applications
IT1193441B (it) * 1983-10-28 1988-06-22 Fossati Onorina Dado autobloccante e procedimento per la sua fabbricazione
FR2557652A1 (fr) * 1983-12-28 1985-07-05 Yamauchi Susumu Ecrou a blocage automatique et son procede de fabrication
FR2560306A1 (fr) * 1984-02-29 1985-08-30 Quenderff Jean Philippe Ecrou de securite multifonctionnel
DE102010010777B4 (de) 2010-03-09 2018-03-29 BÖCO Böddecker & Co. GmbH & Co. KG Verschlussanordnung für ein bewegliches Fahrzeugteil
DE102021112274A1 (de) * 2021-05-11 2022-11-17 SF Handels- und Besitzgesellschaft mbH Schraubmutterrohling zur Herstellung einer Sicherungsmutter sowie Sicherungsmutter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258181A (en) * 1941-01-23 1941-10-07 Henry De Armond Nut lock
US2385390A (en) * 1944-07-28 1945-09-25 Chester D Tripp Lock nut
US2834390A (en) * 1953-12-07 1958-05-13 Stevens Ludlow Resilient coil pawl and ratchet type nut and bolt lock

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR838102A (fr) * 1937-05-20 1939-02-28 Perfectionnements apportés aux écrous indesserrables
US2320030A (en) * 1940-12-30 1943-05-25 Samuel Reginald Smith Diaphragm lock nut
US2363680A (en) * 1941-07-17 1944-11-28 Richard W Luce Threaded locking device
US2391902A (en) * 1943-06-02 1946-01-01 Richard T Hosking Lock nut
CH249469A (de) * 1947-07-17 1947-06-30 Blattner Karl Sicherungsmutter.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258181A (en) * 1941-01-23 1941-10-07 Henry De Armond Nut lock
US2385390A (en) * 1944-07-28 1945-09-25 Chester D Tripp Lock nut
US2834390A (en) * 1953-12-07 1958-05-13 Stevens Ludlow Resilient coil pawl and ratchet type nut and bolt lock

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233262A (en) * 1963-02-18 1966-02-08 Vollman Walter Method of producing locknuts by assembling laminae in a housing
US3333553A (en) * 1964-11-03 1967-08-01 Evans Prod Co Cargo bracing device
EP0972956A1 (en) * 1998-07-17 2000-01-19 Urama S.r.l. Self-restraining metal ring nuts, and processes for the production thereof
US20030147719A1 (en) * 2001-12-12 2003-08-07 Jakob Manfred Self-locking threaded element
US6851905B2 (en) * 2001-12-12 2005-02-08 Hilti Aktiengesellschaft Self-locking threaded element
US20090016848A1 (en) * 2005-12-22 2009-01-15 Hartmut Flaig Screw nut, method of production thereof and corresponding tool
WO2007076968A1 (de) * 2005-12-22 2007-07-12 Hartmut Flaig Schraubmutter, verfahren zu ihrer herstellung und wekzeug dafür
JP2009520929A (ja) * 2005-12-22 2009-05-28 フライク・ハルトムート ナット、ナットの製作方法、およびこれに対応する工具
CN101336348B (zh) * 2005-12-22 2011-06-08 哈特马特·弗莱格 螺母及其制造方法和工具
US8087863B2 (en) 2005-12-22 2012-01-03 Hartmut Flaig Screw nut, method of production thereof and corresponding tool
WO2010034324A1 (de) 2008-09-24 2010-04-01 Hartmut Flaig Schraubmutter, verfahren und werkzeug zu iherer herstellung
US20180058590A1 (en) * 2016-08-26 2018-03-01 Azbil Corporation Regulating valve, valve body, valve stem, and locking member
US10619746B2 (en) * 2016-08-26 2020-04-14 Azbil Corporation Regulating valve, valve body, valve stem, and locking member
WO2024122988A1 (ko) * 2022-12-05 2024-06-13 문상열 신축성너트 및 그 제조방법

Also Published As

Publication number Publication date
NL223677A (uk)
BE563897A (uk)
FR1188753A (fr) 1959-09-25
GB818979A (en) 1959-08-26
DE1125237B (de) 1962-03-08
CH349452A (de) 1960-10-15
NL104754C (uk)

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